The Impact of Surgical Approach on Mid-Term Clinical Outcomes Following Hemiarthroplasty for Femoral Neck Fractures: A Systematic Review and Meta-Analysis of Postero-Lateral Versus Direct Lateral Approaches.

Background

Femoral neck fractures in the elderly often necessitate hemiarthroplasty, but the optimal surgical approach remains a highly debated topic. The postero-lateral and direct lateral approaches are commonly employed, each with benefits and drawbacks. Despite their widespread use, robust, long-term comparative studies on definitive outcomes, including pain, functional recovery, and complication rates, are notably lacking. This systematic review and meta-analysis aim to address this critical gap by meticulously comparing these approaches with long-term follow-up.

Methods

A systematic literature search was performed, including only comparative studies with a minimum 1-year follow-up. A meta-analysis was performed for the primary outcome measures: operative time, dislocations, infections, perioperative fractures and reoperations. Secondary outcomes included a qualitative synthesis of patient-reported outcomes (quality of life, pain, and satisfaction). Methodological quality was assessed using RoB 2.0 for randomized controlled trials and MINORS criteria for cohort studies.

Results

Our meta-analysis provides robust quantitative evidence. The direct lateral approach is associated with a significantly lower risk of post-operative dislocations (I2 = 58%; OR = 2.86, 95% CI: 2.53 to 3.22; p < 0.00001) and a significantly lower rate of reoperation (I2 = 0%; OR = 1.25, 95% CI: 1.12 to 1.40; p = 0.0001) compared to postero-lateral approach. Operative time, infection, and perioperative fracture rates were found to be statistically comparable. However, patient-reported outcomes yielded inconsistent results across studies, often becoming non-significant after adjusting for confounders.

Conclusions

This meta-analysis shows that the direct lateral approach is associated with lower rates of dislocation and reoperation compared with the postero-lateral approach, while patient-reported outcomes remain variable across studies. Further high-quality comparative trials are needed to confirm these associations and guide surgical decision-making.